…m-locate

…rser

The explicit `complete` version is deprecated, so switching straight to
`impl Parser for &str`, a shortcut for the auto-`complete` version.

`char` was consolidated into `one_of` but this jumped straight to
the `impl Parser for char` which is easier to read.

`pair` is deprecated in favor of `impl Parser for (...)`

In winnow 0.5, we can replace this with `tag` and speed it up

Free-standing `recognize` is deprecated in favor of trait methods but it
wasn't even needed here.

This added back in a `tag` that a later release (0.4?) can remove due to
better type inference.

This added a lot of `tag` / `one_of`s that can be removed with a later
release (0.4?)

… FnMut`

…eral form

… form

…::try_map'

This was possible due to improvements in type inference (when you have a
generics problem, throw more `PhantomData` at it...).

In 0.5, `parse_next` modifies input so the old behavior is under the
name `parse_peek` (as it doesn't commit to the parse but returns what it
would commit).
So `unpeek` takes a combinator that doesn't modify input ("peek parses")
and makes it commit to the result modifying the input.

This is added only to ease the transition.  Future commits will work to
remove `unpeek` calls.

… form

Unsure why it was originally needed.  One difference with `nom` is that
we return `Stream::Slice` from `token` parsers, rather than `Stream`,
simplifying the more common cases.

Because parsers now take `&mut I` and all cloning is gone,
we don't need `RefCell` anymore.